The BioEcoOcean project proposes a foundational change in how we approach biological and ecosystem (BioEco) ocean observation to enhance scientific understanding, improve management, and ensure sustainable use and development of the ocean. Our multi-, inter-, and transdisciplinary approach emphasises co-creation with diverse stakeholders to develop a Blueprint for Integrated Ocean Science (BIOS) to support and encourage operational workflows adhering to FAIR Data Principles. This innovative product promotes holistic thinking, facilitates communication, and strengthens the Ocean Observing Value Chain. The project also includes a strong research component, advancing data collection, monitoring, dataflows, and models for BioEco Essential Ocean Variables (EOVs). We will operate in living labs, co-creating with stakeholders, generating new primary data, and leveraging existing data and observing infrastructure globally.